Exam 300-815 topic 1 question 19 discussion

I stand corrected, A is correct CUBE requires transcoding resources registered locally in these scenarios ... Interworking between an OOB method and RFC2833 for flow-around calls https://www.cisco.com/c/en/us/support/docs/unified-communications/unified-border-element/200412-DTMF-Relay-and-Interworking-on-CUBE.html

CUBE requires transcoding resources registered locally in these scenarios Interworking between RFC2833 and Voice In-band Interworking between an OOB method and RFC2833 for flow-around calls CUBE is able to interwork between all other DTMF relay methods with flow-through calls without the need for a transcoder. A is correct

When Does CUBE Require Transcoding Resources for DTMF CUBE requires transcoding resources registered locally in these scenarios Interworking between RFC2833 and Voice In-band Interworking between an OOB method and RFC2833 for flow-around calls CUBE is able to interwork between all other DTMF relay methods with flow-through calls without the need of a transcoder.

Supported In-band DTMF Relay Methods In-band audio DTMF through G711 RFC2833 Supported Out-Of-Band DMTF Relay Methods H.245 Alphanumeric H.245 Signal SIP Unsolicited NOTIFY SIP KPML SIP INFO Correct answer C , ( media flow-around call , flow-through calls)

Correct answer is A. @zeroblasted : We're not talking about transcoding codecs but DTMF relay. Interworking between an OOB method and RFC2833 for flow-around calls CUBE is able to interwork between all other DTMF relay methods with flow-through calls without the need of a transcoder.

media flow-around indicates the media does NOT flow through the CUBE but rather directly between UAC and UAS. Hence, you cannot transcode resources that don't touch the CUBE. Correct answer is C